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A new study says fracking may worsen asthma in children and adults who live near sites where the oil and gas drilling method is used. (Published Tuesday, July 19, 2016)

A new study says fracking may worsen asthma in children and adults who live near sites where the oil and gas drilling method is used.

The study, published Monday in JAMA Internal Medicine, found that asthma treatments were as much as four times more common in patients living closer to areas with more or bigger wells than in those living far away.